Increased digital spindle motor control resolution through...

Details Increased digital spindle motor control resolution through... Increased digital spindle motor control resolution through...

2006-03-14

2006-03-14

Martin, David (Department: 2837)

Electricity: motive power systems

Positional servo systems

Pulse-width modulated power input to motor

C318S560000, C318S631000, C318S625000, C360S075000, C369S044130

Reexamination Certificate

active

07012396

ABSTRACT:
A motor controller provides pulse width modulated drive signals to a motor. A digital demand code for controlling motor speed is input to the motor controller. A dither generator generates a digital dither value, which an adder adds to the demand code to generate a dithered demand code. A position determining circuit determines a rotational position of the motor. A pulse width modulation controller generates pulse width modulated drive signals with duty cycles controlled as a function of a stored set of waveform coefficients, the dithered demand code, and the rotational position of the motor.

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